Gilbert Roberts (Royal Navy officer)

Gilbert Roberts was the second son of Sir Howland Roberts, 12th Baron Glassenbury of Kent and 5th Baronet of Britfieldstown in Cork.[3]

Roberts joined the Royal Navy as a cadet in September 1913, a month shy of his thirteenth birthday. His first posting was HMS Hibernia.

From 1935 to 1937, Roberts studied at the Portsmouth Tactical School. There, he discovered naval wargaming, and became an enthusiastic practitioner. Like many wargaming enthusiasts of his time, he developed his own rules, based mainly on the wargames of Fred T. Jane.

Roberts was given command of the destroyer HMS Fearless in autumn 1937. In December, the Fearless joined a flotilla to patrol the Spanish coast (during Spain's civil war). In late 1938 he developed tuberculosis.[lower-alpha 1] He was deemed medically unfit and retired on 28 October 1938.[2][4]

Roberts convalesced at the King Edward VII Sanatorium in Midhurst until April 1939.[2]

On 1 January 1942 Roberts met with Admiral Cecil Usborne in London. Usborne ordered Roberts to report to the Western Approaches headquarters in Liverpool, where he was to establish the Western Approaches Tactical Unit. This organisation developed tactics by which shipping convoys in the Atlantic could defend themselves from German submarine attacks. Through the use of wargames, performed by a combination of WRENs and Royal Navy officers, he studied the reports of convoy escorts, devised defensive tactics, and trained escort commanders in their use.

In 1944, Roberts was tasked with planning the anti-submarine operations that supported Operation Overlord. These proved highly effective.

According to his colleagues and staffers, Roberts was a difficult man to work for. He was noted for being pushy, stubborn, and intolerant of disagreement. Nevertheless, he was liked and respected by his staff. It is suggested his abrasive personality was aggravated by his illness.[5]

In 1945, Robert visited the Germans' U-boat headquarters in Flensburg. On the wall, he found a portrait of himself, taken from a 1944 article from Illustrated magazine . Allegedly, it bore the caption: "This is your enemy, Captain Roberts, Director of Anti U-boat Tactics",[6] though Roberts didn't mention this caption in his memoirs. He did autograph the portrait for the pleasure of the Germans present.

Gilbert Howland Roberts was born on 11 October 1900. He married, his first wife, Marjorie Brooks on 15 October 1930. They had two children: Michael Gilbert Roberts, born 1932 and Jill Morna Boultbee Roberts, born 1933. He and Marjorie Brooks were divorced in 1947.

He married, his second wife, Jean Warren on 23 August 1947.

He died in January 1986 at age 85 at Torbay, Devon, England.

• Mark Williams (1979). Captain Gilbert Roberts R. N. and the Anti-U-Boat School. Cassell. ISBN 0-304-30386-0.
• Simon Parkin (2019). A Game of Birds and Wolves: The Secret Game that Won the War. Hodder & Staughton. ISBN 9781529353051.